infobar.cpp

版本更新了一下

/*
 Written by Steve Bryndin ([e-mail], [e-mail]).

 This code may be used in compiled form in any way you wish. This
 file may be redistributed unmodified by any means PROVIDING it is
 not sold for profit without the authors written consent, and
 providing that this notice and the authors name is included.
 An email letting me know that you are using it would be
 nice as well.

 This software is provided "as is" without express or implied warranty.
 Use it at you own risk! The author accepts no liability for any damages
 to your computer or data these products may cause.
*/

// From http://www.codeguru.com/submission_guide.shtml :
//
// "While we are talking about copyrights, you retain copyright of
//  your article and code but by submitting it to CodeGuru you give it
//  permission to use it in a fair manner and also permit all developers
//  to freely use the code in their own applications - even if they are
//  commercial."

// Fixed problem with repainting after screen saver ([e-mail])


// InfoBar.cpp : implementation file
//

#include "stdafx.h"
// For bitmap resources
#include "resource.h"
#include "InfoBar.h"

#include <afxpriv.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

class CStaticCmdUI : public CCmdUI
{
public:
    virtual void SetText(LPCTSTR lpszText);
};

void CStaticCmdUI::SetText(LPCTSTR lpszText)
{
    CInfoBar* pInfoBar = (CInfoBar*)m_pOther;
    ASSERT(pInfoBar != NULL);

    pInfoBar->SetText(lpszText);
}


/////////////////////////////////////////////////////////////////////////////
// CInfoBar

CInfoBar::CInfoBar()
{
    m_cyBottomBorder    = m_cyTopBorder = 4;             // l&r default to 6; t&b was 1
    m_caption           = "default";                     // must have some text for CalcFixedLayout
    m_cxAvailable       = 0;
    m_crBackgroundColor = ::GetSysColor(COLOR_3DSHADOW); //Gray
    m_crTextColor       = RGB(255,255,255);              // White
    m_bCustomBkgnd      = FALSE;
}

CInfoBar::~CInfoBar()
{
}


BEGIN_MESSAGE_MAP(CInfoBar, CControlBar)
    //{{AFX_MSG_MAP(CInfoBar)
    ON_WM_CREATE()
    ON_WM_ERASEBKGND()
    ON_WM_PAINT()
    ON_WM_SYSCOLORCHANGE()
    //}}AFX_MSG_MAP
    ON_MESSAGE(WM_SIZEPARENT, OnSizeParent)
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CInfoBar message handlers

int CInfoBar::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if (CControlBar::OnCreate(lpCreateStruct) == -1)
        return -1;

    // TODO: Add your specialized creation code here
    // Comment out this next line for a different 3D effect

//  ModifyStyleEx(0, WS_EX_STATICEDGE);
//  ModifyStyle(0, WS_DLGFRAME);
//  ModifyStyle(0, WS_THICKFRAME);

    // Create a font 5/4 as tall as the system caption bar font
    NONCLIENTMETRICS metrics;
    metrics.cbSize = sizeof(metrics);
    SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &metrics, 0);

    metrics.lfCaptionFont.lfHeight *= 5;
    metrics.lfCaptionFont.lfHeight /= 4;
    VERIFY(m_font.CreateFontIndirect(&metrics.lfCaptionFont));
    return 0;
}

BOOL CInfoBar::OnEraseBkgnd(CDC* pDC)
{
    // TODO: Add your message handler code here and/or call default
    CRect rect;
    GetClientRect(rect);
    pDC->FillSolidRect(rect, m_crBackgroundColor);

    return FALSE;//CControlBar::OnEraseBkgnd(pDC);
}

void CInfoBar::OnPaint()
{
    CPaintDC dc(this); // device context for painting

    CRect r;
    GetClientRect(r);
    CalcInsideRect(r, TRUE);
    r.InflateRect(0, 2);

    int iSavedDC = dc.SaveDC();

    dc.SelectObject(&m_font);

    // added this - [e-mail]
    dc.SetBkMode(TRANSPARENT);

    dc.SetTextColor(m_crTextColor);
    dc.DrawText(m_caption, -1, r, DT_EDITCONTROL |
        DT_EXTERNALLEADING | DT_LEFT | DT_WORDBREAK | DT_END_ELLIPSIS);

    dc.DrawState(CPoint((r.right - m_sizeBitmap.cx),
                 (r.bottom - m_sizeBitmap.cy)/2),
                 m_sizeBitmap, &m_bm, DST_BITMAP);

    dc.RestoreDC(iSavedDC);
}

LRESULT CInfoBar::OnSizeParent(WPARAM, LPARAM lParam)
{
    AFX_SIZEPARENTPARAMS* lpLayout = (AFX_SIZEPARENTPARAMS*)lParam;

    // keep track of the available width for use by CalcFixedLayout later
    m_cxAvailable = lpLayout->rect.right - lpLayout->rect.left;

    return CControlBar::OnSizeParent(0, lParam);
}

// Overridden virtual helper methods

void CInfoBar::OnUpdateCmdUI(CFrameWnd* pTarget, BOOL /*bDisableIfNoHndler*/)
{
    CStaticCmdUI state;
    state.m_pOther = this;
    state.m_nIndexMax = 1;      // there's only one thing to update
    state.m_nID = AFX_IDW_STATUS_BAR;

    // allow the statusbar itself to have update handlers
    if (CWnd::OnCmdMsg(state.m_nID, CN_UPDATE_COMMAND_UI, &state, NULL))
        return;

    // allow target (owner) to handle the remaining updates
    state.DoUpdate(pTarget, FALSE);
}

CSize CInfoBar::CalcFixedLayout(BOOL /*bStretch*/, BOOL bHorz)
{
    // Get border size (values will be negative)
    CRect rBorder; rBorder.SetRectEmpty();
    CalcInsideRect(rBorder, bHorz);

    // Based on the available width minus the border area,
    // calculate the necessary Y value to hold the text
    CRect rCalc(0, 0, m_cxAvailable - (-rBorder.Width()), 0);
    {
        CClientDC dc(this);
        CFont* pOldFont = dc.SelectObject(&m_font);

        dc.DrawText(m_caption, -1, rCalc, DT_CALCRECT | DT_EDITCONTROL |
            DT_EXTERNALLEADING | DT_LEFT | DT_WORDBREAK);

        if (pOldFont != NULL)
            dc.SelectObject(pOldFont);
    }

    // The Y value is the sum of the calculated height from DrawText,
    // plus the top and bottom border.
    CSize size;
    size.cx = 32767;
    size.cy = rCalc.Height();
    size.cy += (-rBorder.Height());

    return size;
}

void CInfoBar::SetText(LPCTSTR lpszNew)
{
    ASSERT(lpszNew && AfxIsValidString(lpszNew));

    if (m_caption != lpszNew)
    {
        m_caption = lpszNew;
        Invalidate();
    }
}

LPCTSTR CInfoBar::GetText()
{
    return (LPCTSTR)m_caption;
}


BOOL CInfoBar::SetBitmap(UINT nResID)
{
    BOOL bRet = FALSE;
    BITMAP  bitmap;
    CSize bitSize;

    m_bm.DeleteObject();
    bRet = m_bm.LoadBitmap(nResID);
    if(bRet)
    {
        m_bm.GetBitmap(&bitmap);
        m_sizeBitmap.cx = bitmap.bmWidth;
        m_sizeBitmap.cy = bitmap.bmHeight;
    }
    Invalidate();
    return bRet;
}

BOOL CInfoBar::SetTextFont(LPCTSTR lpFontName)
{
    BOOL bRet;
    m_font.DeleteObject();

    NONCLIENTMETRICS metrics;
    metrics.cbSize = sizeof(metrics);
    SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &metrics, 0);

    metrics.lfCaptionFont.lfHeight *= 5;
    metrics.lfCaptionFont.lfHeight /= 4;
    strcpy(metrics.lfCaptionFont.lfFaceName, lpFontName);
    bRet = m_font.CreateFontIndirect(&metrics.lfCaptionFont);
    Invalidate();
    return bRet;
}

void CInfoBar::SetBackgroundColor(COLORREF crNew)
{
    m_bCustomBkgnd = TRUE;
    m_crBackgroundColor = crNew;
    Invalidate();
}

void CInfoBar::SetTextColor(COLORREF crNew)
{
    m_crTextColor = crNew;
    Invalidate();
}


void CInfoBar::OnSysColorChange()
{
    CControlBar::OnSysColorChange();

    if (!m_bCustomBkgnd)
    {
        m_crBackgroundColor = ::GetSysColor(COLOR_3DSHADOW);
        Invalidate();
    }
}